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                  <p class="p_Heading1"><span class="f_Heading1">Collaboration Occurrence</span></p>



  
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                <p class="p_TextIndentedL2"><img src="d_colloccurrence.png" width="126" height="95" border="0" alt="d_CollOccurrence"></p>
<p class="p_BodyText"><span class="f_BodyText">Use a </span><span class="f_BodyText" style="font-style: italic;">Collaboration Occurrence</span><span class="f_BodyText"> to apply a pattern defined by a Collaboration to a specific situation, in a <a href="compositestructurediagram.htm">Composite Structure diagram</a>.</span></p>
<p class="p_BodyText"><span class="f_BodyText">The following example uses an occurrence, </span><span class="f_BodyText" style="font-style: italic;">NWServer</span><span class="f_BodyText">, of the Collaboration </span><span class="f_BodyText" style="font-style: italic;">Install</span><span class="f_BodyText">, to define the installation process of a network scanner. This process can be defined by an interaction attached to the Collaboration. (See the </span><span class="f_BodyText" style="font-style: italic;"><a href="collaboration2.htm">Collaboration</a></span><span class="f_BodyText"> topic for a representation of the</span><span class="f_BodyText" style="font-style: italic;"> Install</span><span class="f_BodyText"> Collaboration.)</span></p>
<p class="p_TextIndentedL2"><img src="collaborationoccurrence.png" width="459" height="370" border="0" alt="CollaborationOccurrence"></p>
<p class="p_BodyText"><span class="f_BodyText">To create a Collaboration Occurrence, drag the required Collaboration from the </span><span class="f_UIControl">Project Browser</span><span class="f_BodyText"> onto the diagram and, on the </span><span class="f_UIControl">Paste Element</span><span class="f_BodyText"> dialog, select the </span><span class="f_MenuKeyField">Paste as Link</span><span class="f_BodyText"> radio button.</span></p>
<p class="p_SubHeadingL1"><span class="f_SubHeadingL1">OMG UML Specification</span></p>
<p class="p_BodyText"><span class="f_BodyText">The OMG UML specification (</span><span class="f_BodyText" style="font-style: italic;">UML Superstructure Specification, v2.1.1, p. 173</span><span class="f_BodyText">) refers to a Collaboration Occurrence as a </span><span class="f_UIControl">Collaboration Use</span><span class="f_BodyText">, and states:</span></p>
<p class="p_OMGText"><span class="f_OMGText">A collaboration use represents one particular use of a collaboration to explain the relationships between the properties of a classifier. A collaboration use shows how the pattern described by a collaboration is applied in a given context, by binding specific entities from that context to the roles of the collaboration. Depending on the context, these entities could be structural features of a classifier, instance specifications, or even roles in some containing collaboration. There may be multiple occurrences of a given collaboration within a classifier, each involving a different set of roles and connectors. A given role or connector may be involved in multiple occurrences of the same or different collaborations.</span></p>




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